Automatic plow-foot.



T. M. DUGGER.

I AUTOMATIC PLOW FOOT. APPLICATION FILED NOV. 12, 1912.

Patented July 29, 1913.

2 SHEETS-SHEET 1.

COLUMBIA PMNOGRAPH cm. WASHINGTON. 't'c.

T. M. DUGGER.

AUTOMATIC PLOW FOOT.

APPLICATION FILED NOV.12, 1912.

1,068,868. Patent ed July 29, 191

2 SHEETS-SHEET 2.

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THOMAS M. IDUGGER, or COMANGHE, 'rnxns.

AUTOMATIC PLOW-FOOT.

To all whom it may concern:

Be it known that I, THOMAS M. DUGGER, a citizen of the United States, residing at Comanche, in the county of Comanche and State of Texas, have invented certain new and useful Improvements in an Automatic Plow-Foot, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a plow foot, and

the principal object of the invention is to provide a plow foot which is so constructed that the blade may be very easily removed or put in place when desired.

Another object of the invention is to so construct the plow foot that when the blade is in place there will be no danger of the blade slipping loose.

Another object of this invention is to provide an improved type of connection between the plow foot and the spring, the connection permitting the angle of the plow foot to be regulated.

Another object of the invention is to so construct the connection between the plow foot and the spring that the foot may be very easily released from the connection.

Figure 1 is a view showing the shoe and plow blade in vertical section and the supporting means for the shoe in side elevation. Fig. 2 is a rear elevation of the device shown in Fig. 1. Fig. 3 is a side elevation of the shoe. Fig. 4 is a section along the line l4:, in Fig. 1. Fig. 5 is a front elevation of the shoe. Fig. 6 is a perspective view of the plow blade. Fig. 7 is a perspective view of the connection between the shoe and spring. Fig. 8 is a perspective view of the elements which form the head of the connection shown in Fig. 7. Fig. 9 is a perspective view of the locking block and its operating mechanism.

Referring to the accompanying drawings it will be seen that this invention is used in connection with that type of farming implement which is known as a wheel cultivator, the cultivator being of any desired construction and being provided with the usual horizontal bars 10 with which the cultivator blades are connected. Each ofthese bars 10 carries a clamp 11, with which a short length of pipe 12 is connected by means of the yoke 13. This yoke passes through the clamp 11 and is provided with securing nuts 14 so that the yoke 13 not only holds the pipe 12 in place, but also holds the clamp 11 in an ad- Specification of Letters Patent.

Application filed November 12, 1912.

Patented July 29, 1913.

Serial No. 730,941.

the lower end of the supporting bar 16.

This shoe comprises a body portion having side walls 18 and a front wall 19 which terminates short of the lower end of the shoe. This body portion is hollow and has its side walls connected at their rear edges by the strips 20 and 21 which strips not only brace the side walls, but also serve to hold the plow blade in place. The upper portion of the housing is pivotally connected with the supporting bar 16 by means of a bolt 22 and has its side walls provided with shoulders having openings 23 formed therein. 9

A locking block 2 1 is slidably mounted in the body portion and is provided with .pins 25 which are positioned in slots 26 formed in the side walls 18. These slots are covered by the strips 27 so that there will be no danger of the slots being filled with dirt.

A lever 28 is pivotally mounted between the side walls and is provided at its inner end with a cam head 29. A link 30 has its arms31 pivotally connected with the head 29 and has its lower end pivotally connected with a lug 32 extending from the block 24. When the lever is lowered the locking block .will be at the lower ends of the slots 26 with its lower end positioned between the front wall 19 and the strip 20, and it will then be impossible to remove the plow blade. A hook 33 is carried by the lever 28 and engages an eye 34: so that the lever cannot accidentally swing from the locked position. A pin 36 limits the inward movement of the lever thus preventing it from being moved. inwardly beyond a desired amount.

The plow blade 37 is provided with a heel 38 which has a beveled lower end portion 39 and a neck 40 provided with a reduced upper end portion 41. 'In order to put this plow blade in place the lever 28 must be raised and the neck 40 inserted beneath the front wall 19 and then moved outwardly until the lower end 39 passes into the housing. The blade is then lowered so that the lower end is positioned between the strip 21 and the pin 42, and the lever is then lowered so that the locking block 24; will be positioned between the front'wall' 19 and the reduced end of the neck 10 thus preventing the blade from moving from the desired position. The strip 20 fits against the shoulder43 thus preventing'any upward movement of the blade. It should be noted that when in the locked position that the blade fits beneath'the front wall 19 thus assisting the strip 20' in preventing upward movement'of the blade.

Arod 44 passes through the lug 17 and has its lower'end forin'ed'into ahook 45 which passes through'the neck 46 of a block 47. Plates 48 are secured to the block-i7 by means of a set screw 49 and are provided at their 'outer'ends with openings 50. ii spring'ol is placed 'abou't the rod 4% and has its upper end bearing against the lug 17and has its lower end resting upon the plates 47. A nut 52 is provided'so that the rod may be drawn upwardly thus tighteningthe spring and thus re ulatingthe pivotal inovei'nent of the shoe. dSars 53 and 54 are pivotally connected with the cross bars 48 and have their lower ends provided with pins'55 which fit into the openings 23 and thus connect the shoe with "the spring. It is noted that by moving the pins 55 from one set of openings 28 to another that" the angle of the shoemay be regulated accordingly. A latch '56 is pivoted to a lug 57 carried by the bar 54 and has its end removably secured in an opening formed in the'ba'r'53by means of the set screw 58.

The operation of this device will be readily understood from the above description, it being obvious that thisplowblade may be very quickly and easily removed from the shoe, and that the shoe may be angularly adjusted with respect to the supporting bar 16 and that the tension of the spring elmay be regulated. It'is also obvious that when the plow blade is in place that there is no danger of the blade accidentally working loose since the hook 33 holds the lever 28 in a lowered position thus making it impossible for the blade tomove from between the strip 20 and block 24. It is also noted that even if the hook broke that the blade would not work loose, since it is necessary to raise the blade in order to removeit from the shoe, and that when using this machine the passage of the blade through the dirt does not have a tendency to raise the'blade.

'Havi'ng' thus described the invention what is claimed as new, is

1. A device 'of the character described comprising a support, as'hoe connected with saidsupport, ablade, a securing heel carried by' said blade and positioned in said shoe, a locking block slidably mounted in said shoe and engaging said heel to prevent the removal of said blade, and means for moving said block to permit the removal of said blade. l

2,. A device of the character described comprising a supporting bar, a shoe pivotally connected with said supporting bar, the walls of said shoe being provided with a plurality of openings, a lug, a rod passing through said lug, a hook at the lower end of said rod, a spring mounted upon said rod between said hook and lug, a nut adjustably mounted upon said rod for regulating the tension of said spring, bars pivotally connected with said hook and provided at their lower ends with pins adapted to be mounted in a set of openings formed in said shoe, a link carried by one of said bars and passing through an opening formed in one of the other of said bars, means for holding said link in the opening of said bar, a blade carried by said shoe.

3. In a device of the character described, a shoe comprising a body portion having side walls, a front Wall terminatingshort of the lower ends of said side walls, a pin conecting the lower ends of said side walls, strips connecting the lower ends of said side walls, and positioned in spaced relation, said side walls being provided with longitudinally extending slots terminating adjacent the lower end of said front wall, a locking block positioned in said body portion and provided with pins slidably mounted in said slots, a lever pivotally mounted between the side walls of said body portion, and a link pivotally connected with said lever and with said locking block whereby the movement of the lever will. move said locking block longitudinally of said shoe.

4. In a device of the character described, a shoe comprising a body portion having side walls, a front wall terminating short of the lower ends ofsaid side walls, a pin connecting the lower ends of said side walls, upper and' lower strips connecting the lower end portions of-said side walls, said upper strip being positioned in alinement with the lower end'of saidfro-nt wall, a plow blade,

a heel extending from saidplow blade into said shoe and provided with a reduced lower end portion fitting between said pin and lower strip and with a reduced upper end portion fitting between said upper strip and front wall and beneath said upper strip, a

ing into said body portion, a locking element slidably mounted in said body portion and adapted to engage said heel for holding said operating implement in engagement with said body portion, a lever pivotallymounted in said body portion and connected with said locking element for leading the same into and out of engagement with said heel.

6. In a device of the character described, a shoe comprising a body portion, an operating implement, a heel carried by said operating implement and extending through an opening in said body portion, a locking implement carried by said body portion and 15 adapted to engage the inner end of said heel for holding said operating implement in engagement with said body portion, a lever carried by said body portion, and means connecting said lever with said lock- 20 ing implement for bringing the same into and out of engagement with said heel.

In testimony whereof I hereunto afiix my signature in presence of two Witnesses.

THOMAS M. DUGGER. Witnesses:

JAMEs E. TRIoE, BENJ. S. WHITSETT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

